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* BCC_MAKEFILE: Merge with GC 6.3alpha1 release. * ChangeLog: Likewise. * Makefile.am: Likewise. * Makefile.direct: Likewise. * Makefile.dj: Likewise. * allchblk.c: Likewise. * alloc.c: Likewise. * backgraph.c: Likewise. * configure.host: Likewise. * configure.in: Likewise. * dbg_mlc.c: Likewise. * dyn_load.c: Likewise. * finalize.c: Likewise. * gc_cpp.cc: Likewise. * gc_dlopen.c: Likewise. * gcj_mlc.c: Likewise. * if_mach.c: Likewise. * mach_dep.c: Likewise. * malloc.c: Likewise. * mallocx.c: Likewise. * mark.c: Likewise. * mark_rts.c: Likewise. * misc.c: Likewise. * os_dep.c: Likewise. * ptr_chck.c: Likewise. * reclaim.c: Likewise. * solaris_pthreads.c: Likewise. * solaris_threads.c: Likewise. * sparc_mach_dep.S: Likewise. * threadlibs.c: Likewise. * typd_mlc.c: Likewise. * version.h: Likewise. * win32_threads.c: Likewise. * Mac_files/MacOS_Test_config.h: Likewise. * Mac_files/MacOS_config.h: Likewise. * cord/cordbscs.c: Likewise. * cord/cordprnt.c: Likewise. * cord/de_win.c: Likewise. * doc/README: Likewise. * doc/README.MacOSX: Likewise. * doc/README.changes: Likewise. * doc/README.environment: Likewise. * doc/README.ews4800: Likewise. * doc/README.linux: Likewise. * doc/README.macros: Likewise. * doc/README.win32: Likewise. * doc/debugging.html: Likewise. * doc/gcdescr.html: Likewise. * doc/tree.html: Likewise. * include/Makefile.in: Likewise. * include/gc.h: Likewise. * include/gc_cpp.h: Likewise. * include/gc_local_alloc.h: Likewise. * include/gc_mark.h: Likewise. * include/gc_pthread_redirects.h: Likewise. * include/gc_typed.h: Likewise. * include/new_gc_alloc.h: Likewise. * include/private/dbg_mlc.h: Likewise. * include/private/gc_hdrs.h: Likewise. * include/private/gc_locks.h: Likewise. * include/private/gc_pmark.h: Likewise. * include/private/gc_priv.h: Likewise. * include/private/gcconfig.h: Likewise. * include/private/solaris_threads.h: Likewise. * include/private/specific.h: Likewise. * tests/test.c: Likewise. * tests/test_cpp.cc: Likewise. * configure: Rebuild. * Makefile.in: Rebuild. * mips_sgi_mach_dep.s: Add. * alpha_mach_dep.s: Remove. * irix_threads.c: Remove. * linux_threads.c: Remove. * mips_sgi_mach_dep.S: Remove. * missing: Remove. * powerpc_macosx_mach_dep.s: Remove. * doc/Makefile.am: Remove. * doc/Makefile.in: Remove. From-SVN: r69880
92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/*
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* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1997 by Silicon Graphics. All rights reserved.
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* Copyright (c) 2000 by Hewlett-Packard Company. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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* Original author: Bill Janssen
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* Heavily modified by Hans Boehm and others
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*/
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/*
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* This used to be in dyn_load.c. It was extracted into a separate file
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* to avoid having to link against libdl.{a,so} if the client doesn't call
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* dlopen. Of course this fails if the collector is in a dynamic
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* library. -HB
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*/
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#include "private/gc_priv.h"
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# if (defined(GC_PTHREADS) && !defined(GC_DARWIN_THREADS)) \
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|| defined(GC_SOLARIS_THREADS)
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# if defined(dlopen) && !defined(GC_USE_LD_WRAP)
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/* To support various threads pkgs, gc.h interposes on dlopen by */
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/* defining "dlopen" to be "GC_dlopen", which is implemented below. */
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/* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */
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/* real system dlopen() in their implementation. We first remove */
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/* gc.h's dlopen definition and restore it later, after GC_dlopen(). */
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# undef dlopen
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# endif
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/* Make sure we're not in the middle of a collection, and make */
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/* sure we don't start any. Returns previous value of GC_dont_gc. */
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/* This is invoked prior to a dlopen call to avoid synchronization */
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/* issues. We can't just acquire the allocation lock, since startup */
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/* code in dlopen may try to allocate. */
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/* This solution risks heap growth in the presence of many dlopen */
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/* calls in either a multithreaded environment, or if the library */
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/* initialization code allocates substantial amounts of GC'ed memory. */
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/* But I don't know of a better solution. */
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static void disable_gc_for_dlopen()
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{
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LOCK();
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while (GC_incremental && GC_collection_in_progress()) {
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GC_collect_a_little_inner(1000);
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}
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++GC_dont_gc;
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UNLOCK();
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}
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/* Redefine dlopen to guarantee mutual exclusion with */
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/* GC_register_dynamic_libraries. */
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/* Should probably happen for other operating systems, too. */
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#include <dlfcn.h>
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#ifdef GC_USE_LD_WRAP
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void * __wrap_dlopen(const char *path, int mode)
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#else
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void * GC_dlopen(path, mode)
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GC_CONST char * path;
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int mode;
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#endif
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{
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void * result;
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# ifndef USE_PROC_FOR_LIBRARIES
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disable_gc_for_dlopen();
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# endif
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# ifdef GC_USE_LD_WRAP
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result = (void *)__real_dlopen(path, mode);
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# else
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result = dlopen(path, mode);
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# endif
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# ifndef USE_PROC_FOR_LIBRARIES
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GC_enable(); /* undoes disable_gc_for_dlopen */
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# endif
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return(result);
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}
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# endif /* GC_PTHREADS || GC_SOLARIS_THREADS ... */
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